Update algorithms/operators/tests/test_product.py to be PEP8 complaint
Update algorithms/operators/tests/test_product.py to be PEP8 complaint

SanketDG/networkx,harlowja/networkx,sharifulgeo/networkx,sharifulgeo/networkx,chrisnatali/networkx,kernc/networkx,dmoliveira/networkx,nathania/networkx,harlowja/networkx,farhaanbukhsh/networkx,jfinkels/networkx,ionanrozenfeld/networkx,farhaanbukhsh/networkx,nathania/networkx,ghdk/networkx,jcurbelo/networkx,ghdk/networkx,NvanAdrichem/networkx,goulu/networkx,farhaanbukhsh/networkx,Sixshaman/networkx,dhimmel/networkx,ghdk/networkx,kernc/networkx,tmilicic/networkx,ionanrozenfeld/networkx,RMKD/networkx,JamesClough/networkx,bzero/networkx,sharifulgeo/networkx,ionanrozenfeld/networkx,chrisnatali/networkx,chrisnatali/networkx,dhimmel/networkx,beni55/networkx,cmtm/networkx,nathania/networkx,harlowja/networkx,bzero/networkx,yashu-seth/networkx,RMKD/networkx,dmoliveira/networkx,dhimmel/networkx,blublud/networkx,andnovar/networkx,michaelpacer/networkx,bzero/networkx,blublud/networkx,debsankha/networkx,kernc/networkx,OrkoHunter/networkx,ltiao/networkx,aureooms/networkx,jakevdp/networkx,aureooms/networkx,RMKD/networkx,wasade/networkx,jakevdp/networkx,blublud/networkx,debsankha/networkx,dmoliveira/networkx,debsankha/networkx,aureooms/networkx,jakevdp/networkx